A gearbox housing compatible fixture device capable of rapid changeover

Abstract

This application discloses a gearbox housing compatible fixture device that enables quick changeover, relating to the field of gearbox housing fixtures. It includes: a base, on the upper surface of which cylinder seats a, b, and c are fixedly connected to a first positioning pin; a positioning block b is provided on cylinder seat b; a pressure plate b is provided on the top of cylinder seat b; a pressure plate c is provided on the top of cylinder seat c; a detachable and replaceable positioning block c is provided on cylinder seat c; a quick-change sub-plate is provided on cylinder seat a; a detachable and replaceable pressure plate a is provided on the top of cylinder seat a; the pressure plate a, the positioning block c, and the quick-change sub-plate constitute a compatible changeover assembly; a diamond-shaped positioning pin is provided on the top of the quick-change sub-plate. This invention allows for quick and convenient fixture replacement, providing an accurate positioning reference directly after replacement, without the need to readjust the fixture positioning points or perform trial cutting verification.

Description

Technical Field

[0001] This application relates to the field of gearbox housing fixtures, and more particularly to a gearbox housing compatible fixture device that enables quick changeover. Background Technology

[0002] The gearbox is a core component of the automotive transmission system. The gearbox housing is the foundation for supporting and protecting the internal precision components such as gears and bearings. In the field of machining, in order to ensure the high precision requirements such as the flatness of each mating surface of the gearbox housing and the coaxiality and position of each bearing hole, a special machining fixture must be used to stably position and clamp the housing. The performance of the fixture directly determines the machining quality and production efficiency of the gearbox housing.

[0003] Traditional gearbox housing fixtures typically use a base plate as a support foundation. The base plate is fixed with dedicated support positioning blocks, positioning pins, and hydraulic clamping mechanisms, welded or locked with pins according to the bottom contour and internal reference hole positions of a specific housing model. In actual operation, the operator lifts the gearbox housing to be processed onto the fixture, ensuring the bottom surface of the housing aligns with the top surface of the positioning block on the fixture. Simultaneously, the positioning pins on the base plate are inserted into the reference holes of the housing for positioning. Then, an external hydraulic station is activated, and the hydraulic cylinder drives the pressure plate downwards, firmly fixing the housing to the base to resist the cutting forces and vibrations generated during roughing and finishing, thus completing the machining process for that specific housing model.

[0004] Currently, traditional fixtures are mostly dedicated structures for specific machines. When the production line needs to switch to process different models of gearbox housings, the entire bulky fixture body must be disassembled and replaced. In some cases, two or more completely different fixtures may need to be redesigned and manufactured. This results in fixture storage occupying a large amount of inventory space, increasing equipment investment and manufacturing costs, and making product changeover efficiency very low. Secondly, after each complete fixture replacement, there is a lack of a high-precision, rapid reset mechanism, which cannot directly provide an accurate positioning reference. On-site operators must spend a lot of time re-adjusting the fixture's positioning points using dial gauges, which is quite troublesome.

[0005] Therefore, a gearbox housing compatible fixture device is needed to enable rapid model changeover. It adopts a modular design that fixes the common reference parts and combines them with detachable and replaceable compatible changeover components. This avoids the problems of high cost, large inventory, and low changeover efficiency caused by the traditional fixture that requires a complete replacement of the bulky fixture body when switching between different product models. It also avoids the problems of lacking a precise reset mechanism after replacement, requiring time to readjust the positioning points and easily generating trial cut scraps. Summary of the Invention

[0006] The purpose of this invention is to provide a gearbox housing compatible fixture device that enables rapid model changeover, in order to solve the technical problems of existing traditional fixtures that require the entire fixture body to be replaced when switching to process different models of gearbox housings, resulting in high investment costs, large inventory, low model changeover efficiency, and the need for time-consuming readjustment of positioning points and easy generation of trial cut defective products due to the lack of a precise reset mechanism after replacement.

[0007] This invention provides the following solution:

[0008] A gearbox housing compatible fixture device that enables quick model change includes: a base, on the upper surface of which cylinder seat a, cylinder seat b, cylinder seat c and a first positioning pin are fixedly connected, a positioning block b is provided on cylinder seat b, a pressure plate b is provided on the top of cylinder seat b, and a pressure plate c is provided on the top of cylinder seat c.

[0009] The cylinder seat c is provided with a detachable and replaceable positioning block c, the cylinder seat a is provided with a quick-change sub-plate, and the top of the cylinder seat a is provided with a detachable and replaceable pressure plate a.

[0010] The pressure plate a, the positioning block c, and the quick-change subplate constitute a compatible replacement assembly. The top of the quick-change subplate is provided with a diamond-shaped positioning pin. The diamond-shaped positioning pin and the first positioning pin together constitute a two-pin positioning assembly. The surface of the quick-change subplate is provided with a positioning surface. The positioning surface, the top surface of the positioning block b, and the top surface of the positioning block c together constitute a stepped single-sided support plane. The single-sided support plane cooperates with the two-pin positioning assembly to perform one-sided two-pin positioning of the gearbox housing.

[0011] Furthermore, the pressure plate a, the pressure plate b, and the pressure plate c are respectively disposed on the outer periphery of the single-sided support plane, and the pressure plate a, the pressure plate b, and the pressure plate c cooperate to press down and tighten the gearbox housing supported on the single-sided support plane.

[0012] Furthermore, the pressure plate a is provided with various length specifications, the positioning block c is provided with various thickness specifications, and the quick-change subplate is provided with various height specifications. The pressure plate a, the positioning block c, and the quick-change subplate of various specifications are combined and matched with each other to correspond to different sizes and models of gearbox housings.

[0013] Furthermore, a second positioning pin is provided at the bottom of the quick-change subplate, and a mounting hole matching the second positioning pin is provided on the surface of the base. When the quick-change subplate is replaced, it is positioned by inserting the second positioning pin into the mounting hole on the base. The surface of the quick-change subplate is fastened to the surface of the base by bolts.

[0014] Furthermore, the pressure plate b, the pressure plate c, the positioning block b, and the first positioning pin constitute an unreplaceable universal fixture reference component. The universal fixture reference component, together with the replaced pressure plate a, the positioning block c, and the quick-change subplate, forms a complete housing processing fixture for different models.

[0015] Furthermore, hydraulic drive components are provided inside the cylinder seat a, cylinder seat b, and cylinder seat c. The output end of the hydraulic drive component inside cylinder seat a is connected to the pressure plate a, the output end of the hydraulic drive component inside cylinder seat b is connected to the pressure plate b, and the output end of the hydraulic drive component inside cylinder seat c is connected to the pressure plate c. The hydraulic drive components are used to drive the corresponding pressure plates to press downwards against the surface of the gearbox housing.

[0016] Furthermore, a pressure gauge is provided on the upper surface of the base, and a clamping oil circuit is provided inside the base. The clamping oil circuit is connected to the hydraulic drive components inside the cylinder seat a, cylinder seat b, and cylinder seat c, respectively. The pressure gauge is connected to the clamping oil circuit and is used to display the clamping force of the clamp in real time.

[0017] Furthermore, the top surface of the positioning block c is provided with multiple weight-reducing circular holes, and the side edge of the positioning block c is set as an avoidance arc surface that fits with the outer contour of the gearbox housing.

[0018] Furthermore, a support is provided on the upper surface of the base, and the support has an installation through hole inside.

[0019] Furthermore, the positioning block c has a through hole extending to the bottom, and the positioning block c is detachably connected and locked to the cylinder seat c by a fastener passing through the through hole.

[0020] The above solution achieves the following beneficial technical effects:

[0021] This application sets the cylinder seat, pressure plate b, pressure plate c, positioning block b, and first positioning pin on the base as fixed universal reference components, and sets up a removable and replaceable pressure plate a, positioning block c, and quick-change subplate to form a compatible changeover assembly. When switching between processing different models of gearbox housings, the fixture can be quickly and conveniently changed without replacing the bulky fixture body and redesigning and manufacturing the entire fixture. Only the above three components need to be quickly replaced to achieve compatible processing of different products. This reduces the storage space occupied by the fixture, lowers the investment and manufacturing cost of the fixture, and improves the efficiency of product changeover.

[0022] This application utilizes a diamond-shaped locating pin on the top of the quick-change subplate and a fixed first locating pin to form a two-pin locating assembly. Simultaneously, the locating surface of the quick-change subplate, together with the top surfaces of locating block b and locating block c, forms a stepped single-sided support plane, enabling one-sided two-pin locating of the gearbox housing. Since the replacement quick-change subplate and locating blocks themselves have definite dimensional accuracy, they can directly provide an accurate positioning reference after replacement, eliminating the need to readjust the fixture positioning points and perform trial cutting verification. This reduces the labor intensity of workers and avoids the generation of defective parts due to inaccurate adjustments during trial cutting.

[0023] This application cleverly uses modular disassembly to concentrate the complex positioning and clamping functions into the pressure plate a, positioning block c, and quick-change subplate, which only need to be replaced. The overall device structure is simple, the spatial layout is compact, and it is not prone to interference or failure. On-site operators can complete the processing and switching of different models of products with just a few simple disassembly and replacement steps. The operation method is extremely simple, the failure rate is high, and it meets the requirements of mass production and fast-paced production of gearbox housings in the factory. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0025] Figure 2 This is a top view of the present invention.

[0026] Figure 3 This is a front view of the present invention.

[0027] Among them, 1. base; 2. cylinder seat a; 3. pressure plate a; 4. cylinder seat b; 5. pressure plate b; 6. positioning block b; 7. pressure plate c; 8. cylinder seat c; 9. first positioning pin; 10. positioning block c; 11. pressure gauge; 12. quick-change subplate; 13. support. Detailed Implementation

[0028] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Please see the appendix Figure 1This invention provides a gearbox housing compatible fixture device that enables rapid model changeover, comprising: a base 1, with a cylinder seat a2, a cylinder seat b4, a cylinder seat c8 and a first positioning pin 9 fixedly connected to the upper surface of the base 1; each of the cylinder seats a2, b4 and c8 is provided with a hydraulic drive component; the output end of the hydraulic drive component inside cylinder seat a2 is connected to a pressure plate a3; the output end of the hydraulic drive component inside cylinder seat b4 is connected to a pressure plate b5; and the output end of the hydraulic drive component inside cylinder seat c8 is connected to a pressure plate c7. The hydraulic drive components are used to drive the corresponding pressure plates to press downwards against the surface of the gearbox housing.

[0030] Specifically, base 1 serves as the foundation for the entire clamping system, providing a stable support platform for each component. The hydraulic drive components inside cylinder seats a2, b4, and c8 receive hydraulic power from an external hydraulic station, driving the internal piston-connecting rod mechanism to move linearly. This, in turn, causes the top pressure plates a3, b5, and c7 to generate a downward clamping force. The hydraulic drive not only provides a constant and uniform clamping force, effectively preventing displacement or vibration of the gearbox housing during machining, but also enables automated clamping and releasing through centralized oil circuit control. This improves loading and unloading efficiency, reduces the complexity of manual operation, and ensures absolute safety and stability during high-intensity machining.

[0031] A positioning block b6 is provided on the cylinder seat b4, a pressure plate b5 is provided on the top of the cylinder seat b4, and a pressure plate c7 is provided on the top of the cylinder seat c8. The pressure plate b5, the pressure plate c7, the positioning block b6 and the first positioning pin 9 constitute an irreplaceable universal fixture reference component. The universal fixture reference component, together with the replaced pressure plate a3, the positioning block c10 and the quick-change subplate 12, together form a complete housing processing fixture of different models.

[0032] Specifically, different models of gearbox housings share some common positioning references and outlines. By retaining common positioning and clamping nodes, the loss of basic accuracy caused by frequent disassembly and assembly can be avoided. Through modular design, when switching product models, there is no need to replace the bulky fixture body, reducing the inventory space occupied by fixture storage. At the same time, the maximum reuse of existing common parts reduces the investment and manufacturing costs of redesigning and manufacturing the entire fixture set, enabling the production line to have good adaptability and flexible manufacturing capabilities when facing diverse products.

[0033] The cylinder seat c8 is provided with a detachable and replaceable positioning block c10, the cylinder seat a2 is provided with a quick-change subplate 12, and the top of the cylinder seat a2 is provided with a detachable and replaceable pressure plate a3.

[0034] Specifically, since different models of gearbox housings differ in size and local shape, by setting detachable and replaceable positioning blocks c10, quick-change plates 12, and pressure plates a3 on cylinder seats c8 and a2, operators can quickly remove the parts and replace them with components of another specification simply by using conventional tools to loosen the relevant fastening bolts. The replacement process is simple, which not only shortens the downtime for equipment changeover and improves the overall processing efficiency of the production line, but also simplifies the operation method, ensuring that ordinary workers on site can independently and quickly complete complex replacement tasks, thus meeting the requirements of large-scale, fast-paced production.

[0035] Pressure plates a3, b5 and c7 are respectively set on the outer periphery of the single-sided support plane. Pressure plates a3, b5 and c7 work together to press down and tighten the gearbox housing supported on the single-sided support plane.

[0036] Specifically, during the machining process, the cutting tool generates multi-directional cutting forces on the housing. Pressure plates a3, b5, and c7 are distributed at multiple points on the periphery of the single-sided support plane, forming a stable polygonal force network. Utilizing the principle of triangular or polygonal stability, downward vertical clamping forces are simultaneously applied from multiple non-machining interference edges of the housing. The coordinated action of pressure plates a3, b5, and c7 ensures that the gearbox housing is firmly pressed against the supporting surface below, preventing warping, tilting, or slight displacement of the housing during complex processes such as heavy milling or boring. This guarantees the flatness of the machined surface and the dimensional and positional tolerances of the hole system, providing a robust clamping guarantee for high-precision housing machining.

[0037] The pressure plate a3 is available in various lengths, the positioning block c10 is available in various thicknesses, and the quick-change subplate 12 is available in various heights. The various sizes of pressure plates a3, positioning blocks c10, and quick-change subplate 12 can be combined to match different sizes and models of gearbox housings.

[0038] Specifically, to achieve compatibility between two or more products, the pressure plate A3, positioning block C10, and quick-change subplate 12 are designed as a standardized size matrix. When processing the housing, it can precisely fit the 100mm long pressure plate A3, the 31.2mm thick positioning block C10, and the 101mm high quick-change subplate 12. When changing the housing type, it directly replaces the 80mm long pressure plate A3, the 34.6mm thick positioning block C10, and the 100.7mm high quick-change subplate 12. This parameterized hardware matching method allows the pressure plate A3, positioning block C10, and quick-change subplate 12 to accurately fit the contour differences and positioning height requirements of different housings under different combinations, achieving cross-product model compatible clamping.

[0039] The quick-change plate 12 is provided with a second positioning pin at the bottom. The base 1 has a mounting hole that matches the second positioning pin on its surface. When the quick-change plate 12 is replaced, it can achieve precise positioning by inserting the second positioning pin into the mounting hole on the base 1. The surface of the quick-change plate 12 is fastened to the surface of the base 1 by bolts.

[0040] Specifically, the quick-change plate 12 is precisely positioned on the base 1 through a tight insertion fit between the second positioning pin at the bottom and the high-precision mounting hole on the base 1, which restricts the horizontal freedom of the quick-change plate 12. After the quick-change plate 12 is accurately positioned by the second positioning pin, it is then locked and fixed vertically by bolts. This ensures that the quick-change plate 12 is accurately positioned each time it is replaced, guaranteeing the accuracy of the replaced quick-change plate 12.

[0041] Please see the appendix Figure 2 The pressure plate a3, the positioning block c10 and the quick-change subplate 12 constitute a compatible replacement assembly. The top of the quick-change subplate 12 is provided with a diamond-shaped positioning pin. The diamond-shaped positioning pin and the first positioning pin 9 together constitute a two-pin positioning assembly. The surface of the quick-change subplate 12 is provided with a positioning surface. The positioning surface, the top surface of the positioning block b6 and the top surface of the positioning block c10 together form a stepped single-sided support plane. The single-sided support plane cooperates with the two-pin positioning assembly to perform one-sided two-pin positioning of the gearbox housing. The top surface of the positioning block c10 is provided with multiple weight-reducing round holes. The side edge of the positioning block c10 is set as an avoidance arc surface that fits with the outer contour of the gearbox housing.

[0042] Specifically, the stepped single-sided support plane composed of the positioning surface, the top surface of positioning block b6, and the top surface of positioning block c10 jointly supports the bottom surface of the housing, restricting the three degrees of freedom of the gearbox housing: Z-axis movement, X-axis rotation, and Y-axis rotation. The fixed first positioning pin 9 is inserted into the housing reference hole, restricting the X-axis and Y-axis movement degrees of freedom. The diamond-shaped positioning pin on the quick-change plate 12 is inserted into another reference hole, and its unique diamond cross-section restricts the Z-axis rotation degree of freedom, thereby achieving precise positioning of the housing.

[0043] Since the bottom steps of different housings are different, the replaceable positioning block c10 and quick-change subplate 12 compensate for the height difference. At the same time, the weight-reducing round hole on the surface of the positioning block c10 reduces its own weight, making it easy to quickly transport and replace. The avoidance arc surface on the side of the positioning block c10 conforms to the complex casting outer contour of the housing, avoiding fixture assembly interference and ensuring a smooth clamping process.

[0044] Please see the appendix Figure 3 A pressure gauge 11 is provided on the upper surface of the base 1. A clamping oil circuit is provided inside the base 1. The clamping oil circuit is connected to the hydraulic drive components inside the cylinder seat a2, cylinder seat b4 and cylinder seat c8 respectively. The pressure gauge 11 is connected to the clamping oil circuit and is used to display the clamping force of the clamp in real time.

[0045] Specifically, the integrated arrangement of the clamping oil circuit inside the base 1 not only makes the overall appearance of the fixture simpler and avoids the risk of motion interference caused by messy external pipelines, but also protects the oil circuit from damage and corrosion by machining chips and cutting fluid. The pressure gauge 11 is directly connected in parallel in the main clamping oil circuit. By sensing the pressure change in the hydraulic pipeline, it is converted into a visual pointer reading. When clamping the gearbox housing, the on-site operator can quickly determine whether the current hydraulic system oil pressure meets the clamping force requirements of the process setting standard by intuitively observing the value of the pressure gauge 11. If an abnormal pressure is found, the machine can be stopped in time to check the hydraulic station or pipeline faults, thereby avoiding serious production accidents such as workpiece flying out and tool damage caused by insufficient clamping force.

[0046] The upper surface of the base 1 is provided with a support 13, and the support 13 is provided with an installation through hole. The positioning block c10 is provided with a connecting through hole that extends to the bottom. The positioning block c10 is detachably connected and locked to the cylinder seat c8 by a fastener passing through the connecting through hole.

[0047] Specifically, the support 13 is detachably connected to the base 1 through the mounting through hole to resist the huge torque and high frequency vibration generated during rough machining. When a change of shape is required, the positioning block c10 can be disassembled from the cylinder seat c8 through fasteners for change of shape.

[0048] Working principle: When a certain model of gearbox housing needs to be processed, the operator selects the corresponding compatible replacement components according to the size requirements of the model, namely, a pressure plate a3 of a specific length, a positioning block c10 of a specific thickness, and a quick-change subplate 12 of a specific height. During installation, the second positioning pin at the bottom of the quick-change subplate 12 is inserted into the matching mounting hole on the surface of the base 1 to achieve positioning, and then fastened to the base 1 with bolts; the positioning block c10 uses the internal connecting through hole to insert fasteners, and achieves a detachable and precise connection and locking with the cylinder seat c8; the pressure plate a3 is connected to the output end of the cylinder seat a2 to complete the assembly of the processing fixture.

[0049] During the workpiece positioning and clamping stage, the gearbox housing to be processed is hoisted and placed above the fixture and slowly lowered to a suitable height. The bottom reference surface of the housing contacts the top surface of the fixed positioning block b6, the top surface of the replaced positioning block c10, and the positioning surface of the quick-change plate 12, forming a stepped single-sided support plane that matches the stepped drop at the bottom of the housing, restricting the housing's translation in the Z-axis direction and its rotation around the X and Y axes.

[0050] On the horizontal plane, the first positioning pin 9 fixed on the base 1 is inserted into a reference hole at the bottom of the housing, restricting the translation of the X and Y axes; at the same time, the diamond-shaped positioning pin on the top of the quick-change plate 12 is inserted into another reference hole in the housing, restricting the rotation of the housing around the Z axis. Through the coordinated cooperation of the single-sided support plane and the two-pin positioning assembly, stable and interference-free one-sided two-pin six-degree-of-freedom positioning of the gearbox housing is achieved; at the same time, the avoidance arc surface of the side edge of the positioning block c10 can conform to the complex casting outer contour of the housing, avoiding clamping interference.

[0051] After the housing is positioned, the external hydraulic system is activated. Hydraulic oil is simultaneously delivered to the hydraulic drive components inside cylinder seats a2, b4, and c8 through the clamping oil circuit integrated inside the base 1. The operator can check in real time whether the pressure in the oil circuit reaches the set clamping force standard by observing the pressure gauge 11 set on the upper surface of the base 1. Under the hydraulic power drive, the hydraulic drive components push the pressure plates a3, b5, and c7 connected to the output end to move downward synchronously.

[0052] After the housing is finished, when it is necessary to switch to processing another type of gearbox housing, the operator only needs to loosen the corresponding fasteners, remove the existing pressure plate a3, positioning block c10 and quick-change subplate 12, and quickly replace them with the new specification pressure plate a3, new specification positioning block c10 and new specification quick-change subplate 12 corresponding to the rear housing size, and can directly enter the clamping and mass production of the next type of housing.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A gearbox housing compatible fixture device that enables quick model change, characterized by, include: The base (1) has a cylinder seat a (2), a cylinder seat b (4), a cylinder seat c (8) and a first positioning pin (9) fixedly connected to its upper surface. A positioning block b (6) is provided on the cylinder seat b (4). A pressure plate b (5) is provided on the top of the cylinder seat b (4). A pressure plate c (7) is provided on the top of the cylinder seat c (8). The cylinder seat c (8) is provided with a detachable and replaceable positioning block c (10), the cylinder seat a (2) is provided with a quick-change sub-plate (12), and the top of the cylinder seat a (2) is provided with a detachable and replaceable pressure plate a (3). The pressure plate a (3), the positioning block c (10), and the quick-change subplate (12) constitute a compatible replacement assembly. The top of the quick-change subplate (12) is provided with a diamond-shaped positioning pin. The diamond-shaped positioning pin and the first positioning pin (9) together constitute a two-pin positioning assembly. The surface of the quick-change subplate (12) is provided with a positioning surface. The positioning surface, the top surface of the positioning block b (6), and the top surface of the positioning block c (10) together constitute a stepped single-sided support plane. The single-sided support plane cooperates with the two-pin positioning assembly to perform one-sided two-pin positioning of the gearbox housing.

2. A quick changeable gearbox housing compatible fixture device as claimed in claim 1, wherein, The pressure plate a (3), the pressure plate b (5) and the pressure plate c (7) are respectively arranged on the outer periphery of the single-sided support plane. The pressure plate a (3), the pressure plate b (5) and the pressure plate c (7) cooperate to press down and tighten the gearbox housing supported on the single-sided support plane.

3. The quick-changeable transmission housing compatible fixture device of claim 1, wherein, The pressure plate a (3) is provided with a variety of different length specifications, the positioning block c (10) is provided with a variety of different thickness specifications, and the quick-change subplate (12) is provided with a variety of different height specifications. The pressure plate a (3), the positioning block c (10) and the quick-change subplate (12) of various specifications are combined with each other to match the gearbox housing of different sizes and models.

4. The gearbox housing compatible fixture device for quick changeover according to claim 1, characterized in that, The quick-change subplate (12) is provided with a second positioning pin at the bottom. The base (1) has a mounting hole that matches the second positioning pin on its surface. When the quick-change subplate (12) is replaced, it is positioned by inserting the second positioning pin into the mounting hole on the base (1). The surface of the quick-change subplate (12) is fastened to the surface of the base (1) by bolts.

5. A gearbox housing compatible fixture device for quick model change according to claim 1, characterized in that, The pressure plate b (5), the pressure plate c (7), the positioning block b (6), and the first positioning pin (9) constitute an unreplaceable universal fixture reference component. The universal fixture reference component, together with the replaced pressure plate a (3), the positioning block c (10), and the quick-change subplate (12), form a complete housing processing fixture for different models.

6. The gearbox housing compatible fixture device for quick model change according to claim 1, characterized in that, Hydraulic drive components are provided inside the cylinder seat a (2), cylinder seat b (4) and cylinder seat c (8). The output end of the hydraulic drive component inside the cylinder seat a (2) is connected to the pressure plate a (3). The output end of the hydraulic drive component inside the cylinder seat b (4) is connected to the pressure plate b (5). The output end of the hydraulic drive component inside the cylinder seat c (8) is connected to the pressure plate c (7). The hydraulic drive components are used to drive the corresponding pressure plates to press down on the surface of the gearbox housing.

7. A gearbox housing compatible fixture device for quick changeover according to claim 6, characterized in that, A pressure gauge (11) is provided on the upper surface of the base (1). A clamping oil circuit is provided inside the base (1). The clamping oil circuit is connected to the hydraulic drive components inside the cylinder seat a (2), cylinder seat b (4), and cylinder seat c (8). The pressure gauge (11) is connected to the clamping oil circuit and is used to display the clamping force of the clamp in real time.

8. A gearbox housing compatible fixture device for quick model change according to claim 1, characterized in that, The top surface of the positioning block c (10) is provided with multiple weight-reducing circular holes, and the side edge of the positioning block c (10) is set as an avoidance arc surface that fits with the outer contour of the gearbox housing.

9. A gearbox housing compatible fixture device for quick changeover according to claim 8, characterized in that, The positioning block c (10) has a through hole extending to the bottom. The positioning block c (10) is detachably connected and locked to the cylinder seat c (8) by fasteners passing through the through hole.

10. A gearbox housing compatible fixture device for quick changeover according to claim 1, characterized in that, The upper surface of the base (1) is provided with a support (13), and the interior of the support (13) is provided with an installation through hole.

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